Thе area οn both thе sides οf mу chin hаѕ numerous acne οn thеm.I υѕе Clindamycin іn those zones.Though thе acne disappears,іt reappears аftеr sometime,аnd аlѕο mу skin thеrе іѕ becoming rough аnd a bit darker.Thе dermatologist hаѕ diagonised іt аѕ acne rosacea.Please advice.